Mailinglist Archive: opensuse (4393 mails)

[Alexandr Malusek <Alexandr.Malusek@xxxxxxxxxx>]

Michael Nelson <michaelnel@xxxxxxxxxxxxx> writes:

> Strangely enough though, "strace which ls" reports:
> 
> old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0x40016000
> write(1, "/bin/ls\n", 8/bin/ls
> )                = 8
> munmap(0x40016000, 4096)                = 0
> _exit(0)
> 
> ...but it doesn't get written to the screen:
> 
> seahunt:~$  which ls
> seahunt:~$

Note that strace invokes /usr/bin/which and it reports /bin/ls on the stdout:

$ strace which ls 2>/dev/null
/bin/ls

The following is from bash(1):
:       Aliases  allow  a string to be substituted for a word when
:       it is used as the first word of  a  simple  command.

In "strace which ls" the "which" is the second word and therefore it's
not interpreted as an alias while in "which ls" it is an alias.

--
Alexandr.Malusek@xxxxxxxxxx